When listing a book and scanning the ISBN, information about the book will be auto-filled for you. However, our ISBN database can be incomplete for older books, rare books, or custom bundle listings such as an entire series. Some books may not have an ISBN at all!
In these cases, your best bet is to weigh the books and receive an exact weight to enter as a “Custom weight” (in ounces). However, when you don’t have a scale handy, here are some guidelines for estimated weights:
1 lb or less:
Mass market paperbacks & small children's books
Pango example: A Lady Never Surrenders by Sabrina Jefferies
1 to 2 lbs:
Standard trade paperbacks & YA-sized and standard adult-sized hardcovers
Pango example: Great Big Beautiful Life by Emily Henry
If your standard trade paperback weighs under 1lb, you may wish to mark it as 1 to 2lbs to account for packaging.
2 to 3 lbs:
500+ page trade paperbacks & heftier hardcovers, as well as standard sized cookbooks
Pango example: House of Earth and Blood by Sarah J. Maas
3 to 4 lbs:
Heftier hardcovers, 500+ pages & small-to-medium textbooks and art books, as well as larger cookbooks
Pango example: The Art of Star Wars: The Force Awakens by Phul Szostak
4 to 5 lbs:
Larger textbooks and reference books & larger art books, as well as mass market paperback or 3-book box sets
Pango example: Outlander (1-4) paperback box set by Diana Gabaldon
5 to 6 lbs:
Larger textbooks & reference books, as well as paperback box sets
6 to 7 lbs:
Large coffee table books & larger paperback box sets
Pango example: A Court of Thorns and Roses (Paperback) box set by Sarah J Maas
7 to 8 lbs:
Very large coffee table books & heavier paperback multibook box sets
8 to 9 lbs:
Very large reference books & collections/box sets with multiple large hardcovers
9 to 10 lbs:
Extremely large and heavy books & large box sets/collections
Pango example: A Court of Thorns and Roses (Hardcover) box set by Sarah J Maas